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Note 13 - Segment Information - Operating Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Operating income | $ 122,740 | $ 174,688 | $ 214,812 | $ 168,781 | $ 145,814 | $ 164,972 | $ 163,615 | $ 149,389 | $ 681,021 | $ 623,789 | $ 721,020
JBI [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 401,000 | 407,000 | 450,000
DCS [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 193,000 | 171,000 | 205,000
ICS [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 50,000 | 23,000 | 36,000
JBT [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | $ 37,000 | $ 23,000 | $ 30,000

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- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
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